The documents the NTSB made public do not pinpoint the cause of either crash, but the medical records reveal that both both engineers were morbidly obese and were suffering from severe sleep apnea that had gone undiagnosed, WCBS 880’s Alex Silverman reported.

The NTSB has scheduled a hearing on the crashes for Feb. 6.

Last month, the Trump administration abandoned a plan to require sleep apnea testing for all railroad engineers to the dismay of Sen. Chuck Schumer.

“If there had been testing for sleep apnea there would be people alive walking the face of the earth today who are not unfortunately because the engineer had sleep apnea,” Schumer said at the time. “I know the administration says there are too many regulations but you have to look at each one and see which one makes sense.”

Both the MTA and NJ TRANSIT have added sleep apnea screening in response to recent crashes.